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ALEXANDRIA, Va. -- A recently developed Russian jamming device that can knock out satellite navigation system signals has been sold to numerous countries, opening the possibility that terrorists could seriously disrupt the system that ships and aircraft use to navigate, according to government officials.

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APRIL 13, 1998

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AIR FORCE

Rogue transmitter knocks out GPS signals

BY BOB BREWIN

An errant Air Force transmitter in upstate New York jammed Global Positioning System …...

Ninety-Five Thousand Japanese drivers may have to leave their cars at home, starting today.

Pioneer Electronic Corp., a vendor of Global Positioning System (GPS) devices, had started to receive hundreds of calls for assistance from owners of its products when the GPS display screens started to go blank or the units froze up.